Working out on an empty stomach?

Ive been wondering the same thing. Sometimes I grab a banana before I go to work but other times I just drink water. But I start my work out every morning at 6:00am and finish at about 7:30am. I'm just not hungry that early in the morning. I do have a protein shake after my workout as recovery. But is it a bad thing to workout on an empty stomach?

Also I do have a pre-workout powder (C-4) that I use sometimes but still don't feel a difference.

You do not feel C4. I tried C4 once and I felt like I just had a adrenaline rush and I am ready to breaks some personal record.

Well, opinions vary but I do 30 - 40 miles of fasted cardio a week. Judge for yourself if this produces good results. This isn't even my leanest weight. I'll drop 10 pounds off this by December. Yes, it will rip fat off your body IF you don't overeat. Calories in vs. calories out are the main concern. Everyone here is overthinking this.




It does not use up your muscle for food. It trains your body to use fat for energy for long endurance events.

I'll have what he's having.

I'll have what he's having.

LOL.

When you eat food your body fills up your glycogen stores in your liver, then it fills up your muscle glycogen stores. Leftover energy gets converted to fat. Between your liver and your muscles you have enough energy for about 2 hours of intense exercise. Of course if you haven't' eaten all night long you'll have less and then your body will need to get extra energy from elsewhere. Your body does not prefer to burn muscle. It wants to use body fat. That's what it's there for.

So you workout, use up some body fat and then eat breakfast. Go back to step A where your liver and muscles start refilling. Repeat. The net result of your work still depends on hitting calorie goals and not overeating. Yes you're training your body to more easily use fat for energy working out fasted but if you're adding more gas to your car after it's full you're still going to pack on the weight.

I personally believe that aside from the endurance benefit that fasted cardio does provide a tiny advantage. It's very small but spread out over a year, week after week this little bit of difference adds up to makes a noticable difference.

I normally don't eat when i first get up, but i like to head out for my walk within a half hour or so of waking up. Some mornings, like this morning, i woke up starving so i had a zucchini apple raisin muffin (homemade yummy!) before I left. So for me, it just depends on how i feel. If I'm hungry, i make sure to eat because I'll feel sick and lightheaded before I'm done. No need for that!

If I didn't do my work out as soon as I got up, I don't think I would get it done at all!! I tend to have my breakfast afterwards

I'm similar to this.

http://www.bodybuilding.com/fun/the-myth-of-cardio-before-breakfast-debunked.html

http://www.burnthefatinnercircle.com/members/369.cfm

These articles are not peer reviewed studies and do not do a good job of presenting research on the subject.

The best answer I think is to find what works best for you and do that.

http://www.bodybuilding.com/fun/the-myth-of-cardio-before-breakfast-debunked.html

http://www.burnthefatinnercircle.com/members/369.cfm

These articles are not peer reviewed studies and do not do a good job of presenting research on the subject.

The best answer I think is to find what works best for you and do that.

Also, the studies referenced in the BB article are about subjects with depleted glycogen stores. As Waffle pointed out, our glycogen stores are replenished on a daily basis. If you wake up in the morning and your glycogen stores are depleted you have bigger problems to deal with.

I eat after my work out.

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As for weight training on a fast. I'm surprised to see no one has done that.

I do all my morning workouts fasted. On cardio days (low intensity, steady state) I don't eat anything until lunch. On my weight lifting days I chug a thermos full of chocolate milk immediately after the workout and then eat a high carb/ high protein breakfast when I get to work.

I used to try HIIT on a empty. You know what happen? I was never as fast as I could be with eating something beforehand. As for weight training on a fast. I'm surprised to see no one has done that.

agree with that. on the odd times i got myself out of bed first thing to do insantiy, i at least needed a small apple.

...
As for weight training on a fast. I'm surprised to see no one has done that.

I do all my morning workouts fasted. On cardio days (low intensity, steady state) I don't eat anything until lunch. On my weight lifting days I chug a thermos full of chocolate milk immediately after the workout and then eat a high carb/ high protein breakfast when I get to work.

I guess the body can adapt I used to try weight training on low calories before it, not even fasted, I was never able to finish my working. Not even up to par.

you get used to it. while i'd say you can always perform better propperly primed with nutrition, i think its mostly a mental thing, its not like you muscles will not be able to find a source of energy (even if that be your muscles themselves lol)

the idea is just that sleeping is the longest one typically goes without eating... seeing as how its been that long since you've replenished, glycogen would presumably be somewhat lower then it would be at other points in the day (though that does not necessairly mean they are 'low' or 'depleted'). weight training probably does a better job of that.

I do a half marathon pretty much every weekend fasted. That's a 2,300 calorie burn with no breakfast. That's not to say that you should try that all in if you haven't been doing regular morning fasted workouts but just as an example of how much energy you have left even if you haven't eaten since 8 pm the night before.

its really the fact that how much fat you burn is far less important then how many calories you burn overall that makes it a moot point if you ask me.

Exactly which is why this entire discussion is moot and worthless for people still wanting to lose 30+ pounds. This isn't a factor in your weight loss. It's more about endurance conditioning than anything.

Benefit of working out on an empty stomach: I don't hurl when pulling a heavy deadlift.

I do a half marathon pretty much every weekend fasted. That's a 2,300 calorie burn with no breakfast. That's not to say that you should try that all in if you haven't been doing regular morning fasted workouts but just as an example of how much energy you have left even if you haven't eaten since 8 pm the night before.

i would imagine that some people could wake up and do an Ironman if they really wanted to.

i would not assume the 2,300 cals burned of the energy you 'have left' are all muscle glycogen, which i think is what your saying, otherwise i'm not sure why its worth mentioning

also agree that they point is moot, thats why i said it, but wasting time is the only reason to hop on this forum

This works for me (not as a fat loss tool, but as a workout habit) when I workout in the morning. I wake up early and go run and I've found that, if I eat before I run in the morning, I feel terrible. If I eat lunch or a snack and workout in the evening before dinner, I feel fine. I think it's just that my body doesnt like to have food in my stomach when I work out.

That being said, I haven't noticed any huge differences as a result of working out on an empty stomach.

So much confusion and taking one item and applying it as a blanket statement in this thread.

Depending on intensity, you don't need to burn thru glycogen stores before getting to fat. If you are doing long endurance runs, you want as much of you calories to come from fat stores so the you don't burn thru glycogen & hit the wall. This is the principles of what waffle is talking about. You will find a good bit of people that run marathons practice that way.

And lastly, bodybuilding.com would be the last place I'd go seeking info on running/cardio. They will find any excuse possible to point to muscle being burned so they can avoid cardio at all costs.